Flush tank



D. J. HERTY FLUSHv TANK Filed June 22 Fig. l.

Invenror. Daniel J. Hery DYMMKMY Nov. 27 1923.

Patented Nov. 27, 1923.

U N Y!" E s fg' T DANIEL J. Henry', or yRevenu, ivressnorrusnrgrs.

FLUSH TANK.

Application vfiled June.2 2, 1&21. :Serial 14o.479,5`34.

To (L ZZ whom, t (may concern: i

Beit known that l, DANIELJ. jHnR'rvir, a citizen ofthe United States, ,and resident or' Revere7 county off Suiiolk, State of Massaehusettsr, have invented an improvement in Flush Tanks, of which the following description, in connection with Ithe .accoinpeering drawing, .is e epeeiieeien, like eharaoters on the drawing representing like parts.

This invention `rela-tes Ato improvements in flush tank leonstruetions, and the object thereof is to provide Va novel vforni of flush valve adapted .to discharge the water troni therlush tank. l

A further obieet of the invention i,S to provide a non-leakable flush tank construction ,having a -siphonic ilush valve in which the water will -,autoinatically drain Aoff through the discharge pipe ifthe liquid lin theftank rises above a lpredetermined level.

A further object of the invention is to provide a flush tank construction having a Siphon flush valve in which the siphonic action may v*be readily yinitiated.

Y A further object of vthe invention iS to provide a simple and relatively inexpensive flush valve construction which niay {b e readily installed ineny usuel flush .ieiikeiid which when so installed -`will prevent overlowo'f the tank.

' 'Otherfolojects and features of the invention will more ully appear lfrom the following description the `annexed ldrawings and will be pointedout in the accompanying olairns. y

In the drawings:

`Fig. lis a vertical longitudinal sectional view of a 4flush tank 1equipped with .a pre- Jfer-redV forni of siphonio valvel embodying Inyinvention, the usual ballcock being shown in elevation; v

F ig. 2 is an end elevation of the outlet end of the discharge pipe which leads from/the outlet leg of thesiphonshowing a preferred type or valve. n Y

In usual flush tank constructions Athe liquid is maintainedat apredeterinined nornial level by ,a ballcoek land the .water drawn trom the tankthrough di s charge pipevwhiohisi-equipped witha valve adaptedtoloeoperated by Ya .lever orot-her device and .Se eoiieiiueied as .to oloee outematieally :when .the `teak Lhas been Ven iptied- In such vconstrnotions,lhowever, y .the leakage of Vthe ball-coek will Vcause lthe 'tankv to .overflov- ,Furthermore in ksuoli Constructions the valve frequently becomes figg rode "and either .seeks or reelle eee yi ppefiy Le that ythere Vis Aan v unclesiralole waste of ,liquid The present vinvention is designedto come vSuch diiliculties by provi-dinglaV free flow ofthe liquid freni the iedk'fliiodeli e Siphon which will ,discharge theliquid vlfrom the fiek .te e pfedeieriiiieed -.-.1evel, efler which the Siphon will lpeoonne broken'an'd iilled with .airso thatthe valve dlptinfp are .normally dry. A preferred einhodirnent of .my invention is illustrated .in the drawings .asfappliedio a usual flush tank coinprisinga tankgl ing van inlet pipe 2 leading ffreni A,a suitable eoiiee of Supply end dieehergiiig through@ pipe 3 which extends below the .nornial lov@T level .of :the liquid 4in the :tan-k so .that .the filling of .the y.tank lissuhstantially noiseless. The supply of ive-ierv to .the Geek maybe leontrolled through a .hall-cook .fl operatedhythe usual .float valve 5. Y In .eeeofdenee .with my finienteil .idle liquid is discharged iromiihe @eek ,thioiieli e Siphon having vIieeeiee preferably .ooimeeted to dieelierge .leader produeing Martial reellen ie the Sieben to initiate eiolioiifie action.A V d 'l 'Y As illustrated .herein I:the Lsiphon eornprises en oteke'fleg 6 eed e dieelieleeles 7 neeted et .their .iipperlende E y en iiiiieiied Ufeliered pipe .8 .having veereiV threaded connection at its `Vend with the yupper .ends of the Siphon legs 6 .and 7 'llhesiphon )is so 4positioned in the .tank that thecrest of the under wall of the Uf'shaped ,Section is slightly ahovfythe .normalliquid level in the tank. The disehargelegv' .ofthesiphon is conneotedto a .preferahlyhorizontal pipe or conduit l10 which at its other end is lconnected to an elbow 11 extending through the bottom ofthe tank. The elbow `11 desirahly is provided with an annular supporting flange 12 which yrests upon the bottom of the teilk- Tlie end .portion of the .elbow eeetion l1 desireblv iS- provided with iserew threads 13 which are engaged hy Ia nut 1.5L which Aengages thebottoin of the tank Land Serves .to eieren the 'delige 1.2 firmly -iipoii the bottom of the .tedio A .Suiteble gasket v1.5 may be .interposed bet-Ween ehe .flange 1.2 veed the bottom .of-.the @erik ltofioi1-ii e liqiiidfteht joint. vrllie hori-` Zonteleeetien-.lllfei the outlet-pipe ornenddii deeiiebly yistie.i'ovid.ed with anupwardly extending boss 16 having internal screw threads 17 which are engaged by the external threads :of a pump cylinder 18 which preferably extends vertically in parallelismwith the legs 6 and 7 of the siphon. The cylinder 18 is provided with a piston 19 which is connected by a piston rod 2O to one end of an actuating lever 21 which iS pivotally mounted upon a bracket 22 upon the tankf and is operated by ya cord 23 or any other suitable means. The horizontal pipe 10 desirablyis provided with a suitable valve which is located beyond the pump cylinder 18. l t

In the preferred. construction illustrated herein the end of the horizontal section is provided with avvalve seat 24 which, as illustrated herein,is in th'eform of a bushing having on'its vouter end a flap valve seat preferably slightly inclined 'from the vertical. A iiap valve, 25 is pivotally connected Y by a suitable hinge 26 to the valve seatand 1 siphon will breakthe siphonic action. Thev normally is held by the influence of gravity against the valve seat.

In the operation of the device the ballcock is set to maintainthe liquid inthe tank at a predetermined level 27 which is slightly below the crest 9 of the lower wall of thev inverted Uv-shaped conduit which connects the legs 6 and of the'siphon. If the level ofthe liquid rises above thecrest 9, liquid willflow by gravity to the siphon without producing siphonic action so that the level of the liquid in the tank will neve-r rise beyond thesiphon and inasmuch as the siphon is located below 'the top of the tank all danger of overflow ofthe tank is prevented.

When it is desired to discharge the contents of the tank the actuating lever 21 'is operated by pulling upon the cord 23. This causes the piston Y19 to be raised within the cylinder thus creating a partial vacuum in the discharge leg of the siphon so that the pressure of the air `upon the surface of the liquid will cause it to l flow through the siphonv and initiate the siphonic action. As soon as the siphonic action is commenced the actuating lever may be released and the suction of the-water will cause the piston to be drawn back to its original position. The liquid will then flow through the siphon until the level of therliquid reaches the lower end of the intake leg of lthe'siphon whereby entrance ofair intoA the intake arm of the tank may then be refilled.`

Preferably a check valve, such as that above I described, is provided in the discharge conduit beyond the pump so that it willbe only necessary to create a partial vacuum in the short section of the discharge pipe and the siphonto initiate the siphonic action. However, the presence of lsuch a valve is not absolutely essential if the dispump lfrom the presence of acids, alkali,

or other impurities in the liquid. l

It will also be noted that the siphon .is normally iilled with air and also operates to discharge liquid after the siphonic action is initiated and until the lower end of the siphon is exposed to the air by the lowering l of the liquid level.

It will be understood that the embodiment of the invention disclosed herein is` of an illustrative character and is not restrictive; and, that various modifications in construew tion and arrangement of parts may be made within the spirit and scope of the following claims. v

Having thus described my invention, what Y l claim as new, and desire to secure by Letters Patent, is:

1. A flushA tank construction comprising a tank, a liquid supply, means for maintaining the liquid at a normal predetermined level in said tank, a siphon having its intake leg extending into said tank below saidfnormal liquid level, a dry pump comprising a cylinder connected to the delivery leg of said siphon and a piston reciprocable in said i cylinder operable to create a partial vacuum in said siphon and therebyV to vinitiate siphonic actionand a check valve located beyond said pump adapted to be closed by the suction action of said pump.

2. A non-leakable flush tank construction comprising a tank, a liquid supply, means for normally maintaining the liquid at a predetermined level in said tank, a siphon in said tank'having its intake leg extending below the normal level crest of the siphon slightly above saidliquid level, adischarge pipe having a horizontal section connected to the outlet-leg, a dry of theV liquid and the crest of the siphon slightly above said liquid pump comprising a cylinder communicating with said horizontal conduit, a piston reciprocable in said cylinder, means for actuating said piston and a normally seated valve at the discharge'end of the horizontal section of said discharge pipe adapted to'be tightly closed by the suction of said pump and thereby to facilitate the initiation of the siphonic action.

, 4. A non-lealrable flush tank construction compri'sinor a tank, a liquid supply, means for normLIly maintaining the liquid at a predetermined level in said tank7 a Siphon in said tank having its intake leg extending below the normal level of the liquid and the crest of the Siphon slightly above said liquid level, a discharge pipe having a horizontal section connected to the outlet leg, a dry pump comprising a cylinder communicating with said horizontal conduit, a piston in said cylinder, means for actuating said piston, an inclined valve seat at the end of the horizontal section of said discharge pipe and va valve pivotally mounted in position toE be normally seated on said valve seat by the action of gravity and adapted to be tightly closed by the suction action of the pump and thereby to facilitate the initiation of the siphonic action.

In testimony whereof, I have signed my name to this specification.

, DANIEL J. -HERTY 

